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Telephone and Data Systems, Inc., a diversified telecommunications service company, provides wireless and wireline telecommunications services in the United States. The company's wireless services include national consumer and business rate plans; postpaid plans; prepaid service plans, which consist of voice minutes, messaging, and data services; Smartphone messaging, data, and Internet services to access the Web, e-mail, social network sites, text, picture and video messages, and turn-by-turn GPS navigation, as well as to browse and download various applications; and data services comprise news, weather, sports information, games, ring tones, and other services. It provides wireless devices, such as handsets, modems, mobile hotspots, and tablets; and accessories, such as carrying cases, hands-free devices, batteries, battery chargers, and memory cards, as well as wireless device repair services. The company also offers voice services, including local and long-distance telephone, voice over Internet protocol, voice mail, caller ID, and call forwarding services; broadband services, such as digital subscriber lines and other high-speed Internet data services; network access services; and Internet protocol television and satellite video services to commercial and residential customers and carriers. In addition, it provides collocation, hosting, hosted application management, and cloud computing services; and planning, engineering, procurement, installation, sales, and management services for information technology infrastructure, as well as printing and distribution services. As of December 31, 2012, the company served approximately 5.8 million wireless customers and 1 million wireline connections. It sells its products through retail sales, service centers, direct sales, third-party retailers, and independent agents, as well as through Website and telesales. The company was incorporated in 1968 and is headquartered in Chicago, Illinois.